Before changing the chain, you need to understand if it is time to change it: what should you do? Here is the article for you. Read it and then come back here to read how to change the chain.
A chain is the set of a defined number of links: each link is made up of two external and two internal plates, held together by pins (also called rivets or pins), inserted by interference inside the holes on the plates . A pair of external plates will form a female half link, while a pair of internal plates will create a male half link.
One of the few standardized measurements in the bicycle world is that of the length of the link, which for all chains in the world is 1″ (equal to 25,4 mm).
TYPE OF CHAIN
First, you need to understand what type of chain you have fitted, i.e. how many rear gears your bike has. There are single speed chains (1 gear) up to 12 speeds (the most modern at the time of writing the article).
HOW TO CHANGE A MTB CHAIN
Replacing the chain is an activity that takes fifteen minutes, once you have learned the right manual skills.
TOOLS
- Chain tool: possibly to shorten the chain (and to open/close it in the case of a chain without a link);
- Chain link pliers: tool for opening/closing the chain.
STEP
Open the old chain with the chain tool or by opening the link.
CHAIN SIZE
This is the most complicated part, that is, understanding whether the length of the chain is correct or, possibly, removing some links (with the chain cutter) to shorten it. We publish the method recommended by Shimano and a more practical method.
How to understand the correct length of the MTB chain
CLOSE THE CHAIN
Once you have identified the correct size, you must close the chain, passing it over the rear sprocket pack (the smallest ratio is recommended to have the chain under less tension), the front chainring and both rear pulleys (see photo).
To close the chain, you must bring the two end links together and engage them in the seat of the chain cutter. Or, more simply, use a false link (male and female) to close the chain. The first system is more complicated while the second is more intuitive (you need the appropriate stitching pliers).
In the chain tool system, insert the pawl with your hand and then push it in with the punch of the chain tool. Once the pawl is inserted, remove the flared part by levering it with the chain tool or pliers.
FURTHER LINK
